Feel

Don't ever get to the point where your heart cannot be touched. Let it be touched by the tears and losses of others. Look and see things that are mistaken for commonplace. 

Read. And when you cry, when you feel loss, pain, or joy, know that you feel the emotions of those who have read before you.

Don't hastily dismiss a book you have already read. Allow yourself to feel again. Feel what you have felt before, and embrace it.